For ten years, Hong Surim has been confined, hidden away by the powerful Baek family. Why? He’s suspected to be “Illishine”, a mythical figure said to bring either ruin or salvation to the clan. On his twentieth birthday, the mark of Illishain finally appears on Surim’s body, and his fate is sealed. He is dragged into the cold world of the Baek family, where he’s placed under the control of Baek Wookyeong, the aloof and calculating son of the family head. Surim, having endured years of isolation, has no illusions about love or trust—he plans to use Wookyeong to survive and gain some control over his life. But things don’t go as planned. Wookyeong, at first wary and indifferent, begins to feel drawn to Surim’s strange charm and hidden vulnerability. As the two navigate a maze of family politics, supernatural legacy, and growing attraction, their fates become more entangled than either of them expected. Is Surim truly the cursed savior of the Baek family—or just a pawn in a dangerous game of power and prophecy? In a world where nothing is as it seems, can love be more than just an illusion?